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SubjectRe: [PATCH,RFC] initrd vs. BLKFLSBUF


Happy new year.

I hope that the following patch will be included in the final 2.4.0 release.
Without it, the memory held by initrd ramdisk will never be freed!!!


From: "Werner Almesberger" <>
To: <>
Cc: <>; <>
Sent: Monday, November 20, 2000 11:21 AM
Subject: [PATCH,RFC] initrd vs. BLKFLSBUF

Hi Al,

Jeff Chua reported a while ago that BLKFLSBUF returns EBUSY on a RAM disk
that was obtained via initrd. I think the problem is that the effect of
the blkdev_open(out_inode, ...) in drivers/block/rd.c:rd_load_image is
not undone at the end. I've attached a patch for 2.4.0-test11-pre7 that
seems to solve the problem. Since I'm not quite sure I understand the
reference counting rules there, I would appreciate your comment.

- Werner

---------------------------------- cut here -----------------------------------

--- linux.orig/drivers/block/rd.c Mon Nov 20 02:07:47 2000
+++ linux/drivers/block/rd.c Mon Nov 20 04:03:42 2000
@@ -690,6 +690,7 @@
if (infile.f_op->release)
infile.f_op->release(inode, &infile);
+ blkdev_put(out_inode->i_bdev, BDEV_FILE);
free_inodes: /* free inodes on error */
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